Device for use in the manufacture of gramophone, phonograph, and the like sound-boxes.



J. HOFFAY. GRAMOPHONE,

DEVICE FOR USE IN THE MANUFACTURE OF PHONOGR'APH, AND THE LIKE SOUNDBOXES.

APPLICATION FILED AUG-7, I9I5.

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J. HOFFAY.

DEVICE FOR USE IN THE MANUFACTURE OF GRAMOPHONE, PHONOGRAPH, AND THELIKE SOUND BOXES.

' APPLICATION men AUG. 7. 1915.

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JOSEPH HOFFAY, OF NEW YORK, N. Y,

DEVICE FOR USE IN THE MANUFACTURE OF GEAI/IOPHONE, PHONOGEAIEH, AND THELIKE SOUND-BOXES.

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Specification of Letters Patent.

Patented (lot. 31, 1916..

Application filed August '7, 1915. Serial No. 44,280.

To all whom it may concern:

Be it known that I, J OSE HOFFAY, a citizen of the Republic of Mexico,and a resident of the city of New York, borough of Manhattan, in thecounty and State of New York, have invented a new and Improved Devicefor Use in the Manufacture of Gramophone, Phonograph, and the likeSound-Boxes, of which the following is a full, clear, and exactdescription.

In my copending application filed on the 1th day of April, 1915, SerialNo. 10,698, are described certain improvements in sound boxes or thelike for gramophones, pho11ographs and the like machines having thestylus lever made of a forked formation and keeping under continuoustens on or compression means, preferably passlng through the diaphragm,connecting the bifurcations to the diaphragm and to each other.

The present invention relates to means for temporarily subjecting andholding the bifurcations of such a forked stylus lever underpredetermined stress, while the permanent connecting means are beingapplied to the bifurcations, without liability of unduly straining ordamaging the stylus lever.

To this end, the invention consists 1n. a clamping device, preferablymade of tool steel, provided with a fixed or adjustable gage forcontrolling the clamping action,

and wi'h a second fixed or adjustable gage for holding the stylustudinal displacement,

means for supporting lever against longiand 1f deslred, with leave bothhands of the assembler free.

Embodiments of the invention are illus trated, by way of example, in theaccompanying drawings, in which Figures 1 and 2 are elevations at rightangles to one another; Fig. 3 is a plan, of one form of device; Figs. 4;and 5 are an elevation and a sectional plan of a modified form ofdevice; and Fig. 6 is a sectional view of a sound box having a forkedstylus lever and with which my present invention is employed.

Like or equivalent parts in the drawings are indicated by similarreference numerals.-

The device comprises two opposite clamping members or jaws, 6, 7.

In Figs. 1 to 3, the clamping member 7 has guide ways 28 which freelypass over screw threaded studs 8 fast on the member 6. The

the sound box in position in relation to the stylus lever so as toclamping action is effected by winged nuts 9 on the studs 8. 10, 10, arescrew threaded studs serving as gages for limiting the clamping actionor approach of the members 6, 7. These gages are adjustable in themember 6 and may be locked in position by nuts 11 when desired.

In Figs. 1 and 5 the clamping members are pivoted at 12, and haverearward extensions 18, 1 1. The clamping action is effected by a wingednut 9 on a screw threaded stud 8, fast on the extension 14, and passingfreely through a slot 28 in the extension 13. 10 is a milled nut,adjustable on the stud 8, and serving as a gage for limiting theclamping action, and 11 is a winged nut for locking the gage 10 inposition, when desired.

If desired, the member 6 or extension 14 may be adapted with a vise17-18 for holding the device in position on a work bench or table.

The parts of'the members which engage the bifurcations of the styluslever e are preferably grooved as at 25, and are preferably arranged soas to exert pressure on the bifurcations near to their free ends 26,when subjecting them to stress, thereby utilizing their resiliency alongas much of their length as possible and minimizing possibility of damageparticularly at their junction part.

A gage 19, preferably grooved as at 22 to engage the junction part ofthe bifurcations, is slidably mounted in a guide 20 in the member 6, andadapted to be held fast by a lock nut 21 in the position desired, whichis preferably such as to cause the free ends 26 of the bifurcations tobesituated in line with the central'axis of the diaphragm y, and theconnecting means at, when the gage 19 is engaging the stylus lever asshown, and the fixed or detachable boss to of the sound box casing 0 isabutting against the front face of one of the clamping members, forexample, the member 6, as shown. The gage 19 may also serve as a supportfor the stylus lever while it is being assembled, be fore the pressureis exerted.

23, 23 are adjustable screw threaded studs engaging one of the clampingmembers or extensions thereon, to serve, if desired, as a support forthe sound box casing, and 24, 24 are nuts which may serve to lock thesupports 23 when desired.

The operation of the shown constructions through an aperture in the -bThe predetermined of the device is as followsz'The bifurcated styluslever is inserted in the device as shown with the junction part engagingthe previously set gage 19 and the bifurcations engaging the grooves ofthe clamping members 6, 7. The sound box casing is then inserted asshown betweenthe bifurcations until the free ends 26 thereof are in linewith the central axis of the diaphragm and with the connecting meanswhich are prefably already applied thereto ready to be secured to thebifurcations. It will be understood that one of the bifurcations passesboss of the sound OX- casingif already provided therewith.

pressure is then applied to the bifurcations by screwing down the nut ornuts 9, as much as the previously set 7 gage or gages 10 will permit.The ends of j to the connecting means mare then secured to the ends26 ofthe bifurcations, and the pressure of ,the'clamping members is' then're-. leased by unscrewing the nut or nuts 9. If

' not been previously made fast to the'diaphragm, they are then sosecured, and the connection therebetween is made air tight.

The devlce enables inexpert and inexpensivelabor to be employed, whileinsuring accuracy and quicknessin the production of I the sound boxesandthe same standard of efliciency in all thereof, even When assem- "blingon a large'commercial scale;

'I claim:

1. A device for temporarily subjecting the bifurcations of forked styluslevers of gramophone, phonograph boxes to predetermined stresswhilepermaagainst means for supporting the sound box in polongitudinal andthe like sound nent connecting means are being applied,

comprising fork distorting members, a gage for controlling thedistorting action, and means for holding the stylus lever againstlongitudinal displacement.

2. A device for temporarily subjecting the bifurcations of forked styluslevers of gramophone, phonograph and the like sound boxes topredetermined stress while permanent connecting means are being applied,comprising opposite clamping members, a gage for controlling theclamping action, and a second gage for holding the stylus lever againstlongitudinal displacement.

3. A device for temporarily subjecting the bifurcations of forked styluslevers of gramophone, phonograph and the like sound boxes topredetermined stress while permanent connecting means are being applied,comprising opposite clamping members, a gage for controlling theclamping action, a second gage for holding the stylus lever longitudinaldisplacement, and

sition.

4. A device for temporarily subjecting the bifurcations of forked styluslevers of gramophone, phonograph and the like sound boxes topredetermined stress, comprising fork distorting members, a gage forcontrolling the distorting action, and a second gage for holding thestylus lever against displacement.

JOSEPH HOFFAY.

(iopi es ofthis patent maybe obtained for five cents each, by.addressing the Commissioner of Patents, Washington, D. C.

